A few thoughts on suffering and God's plan:
The world is cursed not by God's choice, but by ours. We were given free will by his divine providence and love for us. We chose sin, and the world has been cursed since the original fall. However, God loves man and wants us to be forgiven and justified, so that we can spend forever in His presence. After all, we were created in His image, to be His worksmanship, to share His love, and for His glory.
We can not always understand His means, but "all things work together for the glory of God." Suffering exists as a means to bring us closer to Him, teach us reliance on Him, and to fulfill His plan. He is, and always has been, in control. THAT is our reassurance. We were never promised prosperity in this world. In fact, we were promised trials. The purpose is for our redemption.
A few scriptures:
"Who has made man's mouth? Who makes him mute, or deaf, or seeing, or blind? Is it not I, the LORD?” (Exodus 4:11).
“I make well-being and create calamity, I am the LORD, who does all these things.” (Isaiah 45:7).
“…and if children, then heirs – heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him.”
(Romans 8:17)
Speaking of the man born blind:
“…this happened so that the work of God might be displayed in his life.” (John 9:3).
Romans 8 is a great resource:
"18 I consider that our present sufferings are not worth comparing with the glory that will be revealed in us. 19 For the creation waits in eager expectation for the children of God to be revealed. 20 For the creation was subjected to frustration, not by its own choice, but by the will of the one who subjected it, in hope 21 that the creation itself will be liberated from its bondage to decay and brought into the freedom and glory of the children of God.
22 We know that the whole creation has been groaning as in the pains of childbirth right up to the present time. 23 Not only so, but we ourselves, who have the firstfruits of the Spirit, groan inwardly as we wait eagerly for our adoption to sonship, the redemption of our bodies. 24 For in this hope we were saved. But hope that is seen is no hope at all. Who hopes for what they already have? 25 But if we hope for what we do not yet have, we wait for it patiently.
26 In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us through wordless groans. 27 And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people in accordance with the will of God.
28 And we know that in all things God works for the good of those who love him, who have been called according to his purpose."
Romans 5:1-5
"“Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ.
2Through him we have also obtained access by faith into this grace in which we stand, and we rejoice in
hope of the glory of God. 3More than that, we rejoice in our sufferings, knowing that suffering produces
endurance, 4and endurance produces character, and character produces hope, 5and hope does not put us
to shame, because God's love has been poured into our hearts through the Holy Spirit who has been given
to us.”
***
The subject of suffering can really only be understood when we gain an understanding of the fallen world and an acceptance of His redeeming grace. The larger picture is one of beauty -- despite our catastrophic decisions that separate us from Him, He has provided a way for us to be redeemed and freed of the consequence of our sin.
I pray that you will read, pray, and discuss with a pastor or elder. We have all questioned and worried and been confused. That's our human mind, and He knows us. There are answers, and when we accept them, we really gain the faith that we need: reliance in His divine grace, love, and providence.